1375204181481 has 105 divisors (see below), whose sum is σ = 2242404141491. Its totient is φ = 842986579968.

The previous prime is 1375204181443. The next prime is 1375204181503. The reversal of 1375204181481 is 1841814025731.

The square root of 1375204181481 is 1172691.

It is a perfect power (a square), and thus also a powerful number.

1375204181481 is a `hidden beast` number, since 1 + 3 + 7 + 52 + 0 + 41 + 81 + 481 = 666.

It can be written as a sum of positive squares in 7 ways, for example, as 851919770025 + 523284411456 = 922995^2 + 723384^2 .

It is not a de Polignac number, because 1375204181481 - 2³³ = 1366614246889 is a prime.

It is a super-2 number, since 2×1375204181481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1375204181411) by changing a digit.

It is a polite number, since it can be written in 104 ways as a sum of consecutive naturals, for example, 5350988905 + ... + 5350989161.

Almost surely, 2^{1375204181481} is an apocalyptic number.

1375204181481 is the 1172691-st square number.

1375204181481 is the 586346-th centered octagonal number.

It is an amenable number.

1375204181481 is a deficient number, since it is larger than the sum of its proper divisors (867199960010).

1375204181481 is an frugal number, since it uses more digits than its factorization.

1375204181481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The spelling of 1375204181481 in words is "one trillion, three hundred seventy-five billion, two hundred four million, one hundred eighty-one thousand, four hundred eighty-one".